| 基于MODIS-NDVI的云南省植被覆盖度变化分析 |
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| 引用本文： | 熊俊楠,彭超,程维明,李伟,刘志奇,范春捆,孙怀张.基于MODIS-NDVI的云南省植被覆盖度变化分析[J].地球信息科学,2018,20(12):1830-1840. |
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| 作者姓名： | 熊俊楠 彭超 程维明 李伟 刘志奇 范春捆 孙怀张 |
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| 作者单位： | 1. 西南石油大学土木工程与建筑学院,成都 6105002. 重庆欣荣土地房屋勘测技术研究所,重庆 4000203. 中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室,北京 1001014. 四川省煤田测绘工程院,成都 6100725. 西藏自治区农牧科学院农业研究所,拉萨 850000 |
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| 基金项目： | 中国科学院战略性先导科技专项子课题 “关键节点气候变化相关环境问题和风险识别及应对方案”（XDA20030302）;水科院全国山洪灾害调查评价项目（SHZH-IWHR-57）;国家自然科学基金项目(51774250);西藏自治区科技支撑计划项目(省809);西南石油大学科技创新团队项目(2017CXTD09) |
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| 摘 要： | 植被覆盖变化监测是区域资源环境承载力研究的基础,本文通过计算2001-2016年MODIS-NDVI植被指数,辅以趋势分析、变异系数等方法,估算了2001-2016年云南省植被覆盖度,进而探讨了植被覆盖度的时空变化特征及与地形因子之间的分布关系。结果表明：① 2001-2016年云南省植被覆盖度呈显著增加趋势,增速为4.992%/10 a。② 在空间上,植被覆盖度空间格局呈现由南向北、由西向东逐渐降低的特征,滇西、滇西南地区植被覆盖度最高,滇西北地区最低;植被覆盖度稳定性表现为由西南向东北方向波动性越来越大;滇东北地区植被覆盖度增加趋势明显优于其他区域,研究区内植被覆盖度变化趋势为增加、基本稳定和减少趋势的面积分别占49.53%、43.76%和6.71%。③ 植被覆盖度在2001-2006年、2006-2011年、2011-2016年3个时段的面积转移矩阵结果均表现为植被覆盖进化面积大于退化面积,二者的比值分别为1.42、1.63、2.01,植被覆盖情况呈持续改善趋势。④ 云南省植被覆盖度与地形因子之间的关系表现为,平均植被覆盖度随海拔增加呈先增加再减少、再增加、再减少趋势;随坡度的增加呈先增加再减少趋势;随坡向的变化呈由北向南逐渐减少趋势。
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| 关 键 词： | 植被覆盖度 时空变化 趋势分析 变异系数 云南 |
| 收稿时间： | 2018-08-09 |
Analysis of Vegetation Coverage Change in Yunnan Province Based on MODIS-NDVI |
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| XIONG Junnan,PENG Chao,CHENG Weiming,LI Wei,LIU Zhiqi,FAN Chunkun,SUN Huaizhang.Analysis of Vegetation Coverage Change in Yunnan Province Based on MODIS-NDVI[J].Geo-information Science,2018,20(12):1830-1840. |
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| Authors: | XIONG Junnan PENG Chao CHENG Weiming LI Wei LIU Zhiqi FAN Chunkun SUN Huaizhang |
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| Abstract: | The monitoring of vegetation cover change is the basis of regional resource and environmental bearing capacity research. This paper estimates the vegetation of Yunnan Province from 2001 to 2016 by calculating the MODIS-NDVI vegetation index from 2001 to 2016, supplemented by trend analysis, and coefficient of variation. Next, the spatial and temporal variation characteristics of vegetation coverage and its distribution relationship with topographic factors are discussed in depth. Results are shown as follows: ① From 2001 to 2016, the vegetation coverage in Yunnan shows a significant increase, with a growth rate of 4.992%/10 a.② Spatially, the spatial pattern of vegetation coverage appears to be gradually decreasing from the south to the north and from the west to the east. The vegetation coverage is highest in the west and southwestern Yunnan and the lowest in the northwestern Yunnan. The stability of the vegetation coverage is characterized by increasing volatility from southwest to northeast; the increase of vegetation coverage in northeastern Yunnan was significantly better than other areas. The study region of the vegetation coverage change trend which was increased, basically stable and decreased, accounting for 49.53%, 43.76% and 6.71%, respectively.③ The area transfer matrix results of vegetation coverage in the three periods from 2001-2006, 2006-2011, and 2011-2016 all showed that the vegetation cover evolution area was larger than the degraded area, and the ratios of the two were 1.42, 1.63, and 2.0. It indicates that the vegetation coverage shows a continuous improvement trend in the study area. ④ The relationship between vegetation coverage and topographic factors in Yunnan Province shows that the average vegetation coverage increases first, then decreases, then increases, and then decreases with the increase in altitude; it increases first and then decreases with increasing slope; Changes have gradually decreased from north to south. |
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| Keywords: | vegetation coverage temporal and spatial changes trend analysis variation coefficient Yunnan Province |
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